error[E0220]: associated type `Assoc` not found for `V`
  --> $DIR/issue-96287.rs:7:33
   |
LL | pub type Foo<V> = impl Trait<V::Assoc>;
   |                                 ^^^^^ there is an associated type `Assoc` in the trait `TraitWithAssoc`
   |
help: consider restricting type parameter `V`
   |
LL | pub type Foo<V: TraitWithAssoc> = impl Trait<V::Assoc>;
   |               ++++++++++++++++

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0220`.